Canon G5 X has a 20.0MP 1" (13.2 x 8.8 mm ) sized BSI-CMOS sensor and features DIGIC 6 processor. On the other hand, Leica X Vario has a 16.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor .
Below you can see the G5 X and X Vario sensor size comparison.
As seen above, Leica X Vario has a 3.2x Larger sensor area than Canon G5 X. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.